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10. How to use XRD for thickness  measure ment? Please give the basic principle and procedures. (requirement: don¡¯t use Scherrer equation and adsorption calibration, use diffraction pattern)     

11. Please verify: FCC in real space is BCC in reciprocal space.   

12. Please identify this material and index it (MnO2), and show the electron incident axis, <uvw>












13.  Please  index  the  following  two  phases  and  show the  epitaxy  relationship.  Substrate  is  silicon,  uvw  for
silicon is <110>, the other phase is FeSi2.
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